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  Endianness issue in the VPHN topology update code

Status in linux package in Ubuntu:

Bug description:
  -- Problem Description --
  The current VPHN code assumes the NUMA toplogy updates data are big endian. 
They are native endian actually since the hypervisor pass them through 
registers. This has a great performance impact on little endian guests.

  A fix has been sent to fix the issue:


  Please pick the following commit from Michael Ellermans's tree:


  which reads: "powerpc/vphn: NUMA node code expects big-endian"

  Now upstream:

  commit 5c9fb1899400096c6818181c525897a31d57e488
  Author: Greg Kurz <gk...@linux.vnet.ibm.com>
  Date:   Wed Oct 15 12:42:58 2014 +0200

      powerpc/vphn: NUMA node code expects big-endian

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